Metrolinx is warning GTA commuters to avoid Union Station due to major signal problems near Scarborough GO station.

Spokesperson Scott Money said these problems have caused delays along the Lakeshore East, Stouffville and Lakeshore West lines.

“We want to apologize to customers during rush hour,” Money said. “But because safety is essential to everything we do, there is a bottleneck in that area and we can’t move trains as quickly through that area as we normally would.”

The delays on Lakeshore East and Lakeshore West and the Kitchener line continued late into the night.